“The Office” U.K. star Ewen MacIntosh died at 50.

MacIntosh was best known for playing office accountant Keith in the award-winning British sitcom.

The Welsh actor also appeared in “Miranda” and “Little Britain,” as well as “After Life,” another Ricky Gervais project; he made a cameo in the 2022 finale.

JustRight Management announced MacIntosh’s death on Wednesday morning: “With great sadness we announce the peaceful passing of our beloved comedy genius Ewen MacIntosh.

“His family thanks everyone who helped, especially Willow Green Care Home.”

Gervais was among the first to acknowledge his former collaborator as “an absolute original”.

“Very sad news. The very funny and very lovely Ewen Macintosh, known as ‘Big Keith’ from The Office, has passed away,” Gervais wrote on X.

Most recently, the actor and comedian appeared on “Ant And Dec’s Saturday Night Takeaway” and briefly on “EastEnders” in 2020.

He appeared in Gervais’ comedies “Lead Balloon,” “Mile High,” and “Life’s Too Short,” as well as the British films “Big Fat Gypsy Gangster” and “Finding Fatimah.”

In February 2022, Macintosh tweeted: “Bad times for me I’m afraid, chums.” He was hospitalized. Maintain your strength.”